Synthesis of 3,3-Diarylazetidines by Calcium(II)-Catalyzed Friedel–Crafts Reaction of Azetidinols with Unexpected Cbz Enhanced Reactivity
作者:Camille Denis、Maryne A. J. Dubois、Anne Sophie Voisin-Chiret、Ronan Bureau、Chulho Choi、James J. Mousseau、James A. Bull
DOI:10.1021/acs.orglett.8b03745
日期:2019.1.4
Azetidines are valuable motifs that readily access under explored chemical space for drug discovery. 3,3-Diarylazetidines are prepared in high yield from N-Cbz azetidinols in a calcium(II)-catalyzed Friedel–Crafts alkylation of (hetero)aromatics and phenols, including complex phenols such as β-estradiol. Electron poor phenols undergo O-alkylation. The product azetidines can be derivatized to drug-like
氮杂环丁烷是有价值的基序,可以很容易地在探索的化学空间中用于药物发现。3,3-二芳基氮杂环丁烷是由N -Cbz氮杂环丁醇以钙(II)催化的(杂)芳族化合物和酚(包括复杂的酚,例如β-雌二醇)的Friedel-Crafts烷基化反应制得的。电子贫酚会发生O-烷基化。产物氮杂环丁烷可以通过氮杂环丁烷氮和芳族基团衍生为药物样化合物。该Ñ -Cbz组是由四元环上提供中间碳阳离子的稳定化反应性的,以关键。